Feeding device for tubing-machines.



G. F. FISHER.

- FEEDING DEVICE FOR TUBING MACHINES.

APPLICATION FILED JUNE 4. 1915.

1 1 78,908. Patented; Apr. 11, 1916.

(June/wk Georye F.F'z's/er, %1 11,114 auto (mu,

GEORGE F. FISHER, OF PLAINFIELD,

NEW JERSEY, ASSIGNOR TO MORGAN & WRIGHT,

A CORPORATION OF MIC7HIG-AN.-

FEEDING nnvrcn ron TUBING-MACHINE8.

Specification of Letters Patent.

Patented Apr. 11, 1916.

Application filed June 4, 1915. Serial No. 32,036.

To all whom it may concern:

Be it known that I, Gnonon F. Frsmm, a citizen of the United States, residing at Plainfield, in the county of Union, State of New Jersey, having invented certain new and useful Improvements in Feeding Devices for Tubing-Machines, of which the following is a full, c1ear,'and exact description.

for machines for treating or forming plastic material, such as vulcanizable rubber commaterial into the screw without undue pressure and without material loss of energy,

owing to variations in the consistency or character of the material.

For a detailed description of one form of my invention, which I at present deem preferable, reference may be had to the following specification and to the accompanying drawings froming a partthereof, in which:

Figure 1 is a side elevation and partial longitudinal sectional view of a tubing ma-- chine, showing my improvements applied thereto; Fig. 2 is a vertical sectional view on the line 2-2, Fig. 1; Fig. 3 is a vertical sectional view taken on the line 3-3, Fig. 2; and Fig. 4 is a horizontal sectional view taken on the line 4-4, Fig. 2.

Referring to the drawings, the numeral 1 indicates a tubular or cylindrical casing having a thrust-bearing 2 at one end .and

the feed worm or screw 3 located within the same. An opening or hopper 4 is provided at the opposite end of the casing through which the material to be treated is admitted to the worm 3. Adjacent the bottom of the opening 4 and at one side thereof, is a roll My invention relates to feeding devices- 5 which is preferably so located as to contact with the edges of the convolutions of the worm 3, (Fig. 4). The driving shaft 6 for the worm 3 extends through the head 7 of the casing and carries on its outer end a gear (not shown) or a similar driving means for the worm 3. The shaft 6 also carries a gear 9 which meshes with a gear 10 on the trunnion 11 which supports the roll 5. The roll 5 is preferably made hollow and communicates with a supply pipe 12 through the trunnion 13. Thus steam or other heating medium may be supplied to warm the stock as it passes to the feed worm.

Within and attached to the casing 1 is.

a blade or plate 14 having one edge in contact with the feed roll 5. This serves to remove by a scraping action any rubber composition that may tend to adhere to the roll. It should be noted that the action of the roll 5 not only feeds the material through the opening 4, to the worm 3, but also rolls or compacts the material into, the spaces between the convolutions of the worm, thus tending to make the same more homogeneous, and prevent the formation of air or other fluid-retaining pockets before the material has entered the interior of the casing where there is less opportunity for fluids to escape. It is obvious that the roll 5 may be roughened in any suitable manner to more positively engage the material, if desired.

What I claim and desire to protect by Letters Patent is:

1. Ina tubing machine, in combination with a feed, screw, a roll located adjacent thereto and directly cofiperating therewith 'to force the material in a continuous body into the spaces between the convolutions thereof.

2. In a tubing machine, in combination with a feed screw, a roll located adjacent thereto, and directly coiiperating therewith to force the material in a continuous body into the spacebetween the convolutions of said screw, and means for driving said screw and said roll at definite relative speeds.

3. In a tubing machine, in combination g mweee with a cylindrical casing, a feed screw 10-. cated therein, said casing having an opening adjacent its end, a roll located in said opening adjacent the end of said screw and di- 'rectly cooperating therewith, to force the material in a continuous body into, and compact the same in, the spaces between the convolutions of said screw, and means for simultaneously driving said screw and roll at definite relative speeds. 1O Signed at New York this 3d day of June,

GEORGE F. FISHER. 

